Local Sidereal Time4.2 - App Store

Sidereal helps you track local sidereal time from your current location or any place you want to check. It is designed for people interested in the 13:30 LST window discussed in remote-viewing literature, while also supporting any custom sidereal target you want to follow.

Use Sidereal to:

View a live local sidereal clock based on your current location
Calculate local sidereal time manually from longitude, date, and time
Search for a city or address and see the result with map support
Generate the next 31 upcoming hits for your selected sidereal target
Schedule the next 30 days of on-device alerts
Export future times to CSV and export events to your calendar
Customize your target LST, alert timing, full-window notifications, night viewing, and map visibility
Sidereal starts with 13:30 LST as the default target, but you can change it in Settings to track any local sidereal time. The app includes a trial, with Pro unlocking continued access to advanced tools and planning features.

Version History Added Home Screen and Lock Screen widgets so you can see your local sidereal time at a glance.
Improved widget updates so the time stays fresh throughout the day.
Refined the widget experience for quicker, easier viewing without opening the app. 4.2 May 1 Improved alert reliability and notification refresh behavior
Alerts now refresh automatically while you use the app
Added pull-to-refresh on the Alerts screen
Saved LST time now updates only after you finish choosing it
Simplified alert settings and removed the full-window alert option
Additional Apple Watch reminder improvements and cleanup 4.1 Apr 19 Version 4.0 is a major rebuild and redesign of Sidereal.

Added a tab-based layout for faster access to Clock, Manual, Search, Alerts, and More
Added a manual LST calculator with date/time input, copy support, and current-location fill
Added city and address search with mapped sidereal results
Added future target-time planning with the next 31 upcoming results and CSV export
Added improved alerts with saved 30-day schedules, calendar export, and remove/update controls
Added customizable target LST, alert lead times, and optional full-window notifications
Added Night Viewing mode and Hide Maps settings
Improved location handling, purchase restore flow, and iPhone/iPad behavior 4.0 Apr 17 Bug fixes and general maintenance. 3.5 12/13/2022 Added a privacy policy link on the contact us page. Fix bugs. 3.4 02/26/2022 Fixed a bug with the app badge notification icon number always showing 1. 3.2 10/18/2021 General maintenance and bug fixes. 3 07/02/2021 Fix issue with in-app purchases. 2.72 06/08/2020 Fixed an issue with future 13:30 sidereal times page and notifications. Fixed an issue on the more info page where it was not displaying the current timezone. Added the version number next to the version text on the menu slideout. 2.71 02/12/2019 Added the ability to control when you receive 13:30 LST notifications. You can receive the message 15 minutes, 30 minutes, 45 minutes, 1 hour, 1 1/2 hours or 2 hours before it's 13:30 LST. Also added some performance updates. The main page and future 13:30 times page should load faster. 2.7 10/29/2018 Performance updates and maintenance. 2.6 07/23/2018 Added a new settings page with 3 new settings. 1) Dark or Light theme. 2) Adjust for daylight savings time. 3) Choose default map type. 2.5 03/24/2018 Fixed an issue with getting sidereal time for iOS 11. 2.1 01/25/2018 New 13:30 LST feature. Bug Fixes 2.0 01/22/2018 General maintenance and bug fixes. 1.03 09/11/2017 1.0 07/20/2017